/*
 * Copyright ConsenSys AG.
 *
 * Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with
 * the License. You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on
 * an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the
 * specific language governing permissions and limitations under the License.
 *
 * SPDX-License-Identifier: Apache-2.0
 */
package org.hyperledger.besu.ethereum.p2p.discovery.internal;

import java.util.Collection;

@FunctionalInterface
public interface PeerRequirement {

  PeerRequirement NOOP = () -> true;

  boolean hasSufficientPeers();

  static PeerRequirement combine(final Collection<PeerRequirement> peerRequirements) {
    return () -> {
      for (final PeerRequirement peerRequirement : peerRequirements) {
        if (!peerRequirement.hasSufficientPeers()) {
          return false;
        }
      }
      return true;
    };
  }
}
